[1.10.x] Fixed #27805 -- Fixed ClearableFileInput's "Clear" checkbox on model fields with a default.

Backport of 4353640ea9495d58fabd0357253b82de3b069408 from master

1 files changed, 6 insertions, 0 deletions

diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 1d5fabe064..179341636c 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -440,6 +440,12 @@ class ClearableFileInput(FileInput):
     def use_required_attribute(self, initial):
         return super(ClearableFileInput, self).use_required_attribute(initial) and not initial
 
+    def value_omitted_from_data(self, data, files, name):
+        return (
+            super(ClearableFileInput, self).value_omitted_from_data(data, files, name) and
+            self.clear_checkbox_name(name) not in data
+        )
+
 
 class Textarea(Widget):
     def __init__(self, attrs=None):